New communication technologies, social media, and public health

New communications technologies constitute a rapidly changing field with tremendous opportunities for public health practice. Platforms include a variety of apps, which share the general characteristics of platforms to share words, text, and video content, but which have important differences in their preferred formats of media, strategies for sharing information within social networks, and user bases. These technologies can facilitate public health efforts through the provision of information, as portals for communication with those in need of services, and as platforms for public health interventions. Social media platforms also give rise to the possibility of using public data to increase understanding of health concerns and programmes—for example, using public data on internet searches or social media postings to identifying trends in infectious diseases. Despite these exciting possibilities, there are important heterogeneities globally in the coverage of smartphone devices, in data speed, and in access to data services. There are also important considerations about possible harms of technologies, and about privacy concerns for users of social media in the context of public health.